S. 154 : Rectification of mistake -Mistake apparent from the record- Return of income-Assessee was directed to file order treating return as invalid with revenue and a copy of ITR form uploaded with system of revenue and return which was treated as defective. On receipt of above documents, revenue shall dispose of rectification petition filed by assessee after giving assessee an opportunity of hearing. [S. 44AB, 139(9), Art. 226]